Tetsuya Nakamura updated the cloudnativedaysjp/cnd-handson repository to improve onboarding reliability by refining its documentation. He focused on the README, clarifying installation steps and locking the Docker version reference to the latest supported release, which helped reduce installation errors and support requests. Using Markdown and leveraging his documentation skills, Tetsuya ensured that setup instructions aligned with current Docker requirements, making the onboarding process clearer for new users. While no bugs were fixed during this period, his work emphasized maintainability and clarity, addressing a common pain point for users and contributing to a smoother experience for those deploying the repository.